Venture Capital Portfolio Strategy: Build for the Power Law

A venture capital portfolio strategy is the plan for how an investor spreads capital across startups: how many companies to back, how big each first check is, what ownership it buys, and how much to hold back for follow-on rounds. Because a few companies produce most venture returns, a common goal is to own enough of enough companies to catch them.

Definition: Venture capital portfolio strategy (also called portfolio construction) is the set of rules that turns an investment thesis into numbers: company count, initial check size, ownership target, reserves, and pacing.

Everyone in venture seems to have a favorite number. Five big bets. Thirty. Two hundred.

We think the count should come last. Thesis, check size, ownership and reserves come first, and the number of companies mostly falls out of them. That logic holds for a $200M fund and a $200K angel budget alike.

Why venture capital portfolio strategy starts with the power law

In public markets, diversification narrows the range of outcomes around an average return. Venture doesn't work like that.

Returns follow a power law: most investments return little or nothing, and a few return many times the money. Many investors build on the assumption that one or two companies will pay for everything else. Three widely cited data sets show the pattern:

Source	Data set	What it found
Andreessen Horowitz (Chris Dixon, 2015), citing Horsley Bridge	Hundreds of VC funds Horsley Bridge invested in since 1985	About 6% of investments, representing 4.5% of dollars invested, generated about 60% of total returns
Benedict Evans (2016), citing Horsley Bridge	Just over 7,000 investments, 1985 to 2014	Around half returned less than the original investment; 6% returned at least 10x and made up 60% of total returns
Correlation Ventures (2023)	US venture-backed companies that exited over the prior decade	Less than 4% of capital invested generated 10x or more; 37% of capital returned less than 1x; by count, nearly half of financings lost money

The Horsley Bridge data carries a second lesson that surprises new investors: the top-performing funds had more deals that lost money than merely good funds did. One reading is that great funds swing for bigger outcomes and accept more misses as the price of admission.

We draw two rules of thumb from this. First, it helps to hold enough companies that a big winner is likely to be in the portfolio. Second, many investors only back companies capable of a very large outcome, because the winners tend to pay for everything else.

Five dials, and why they move together

One way to think of a portfolio is as five dials. They are linked: set any three, and the other two are mostly determined.

Thesis. The stages, sectors, and geographies you invest in, and why you have an edge there. See the investment thesis guide.
Company count. How many initial investments you plan to make.
Initial check and ownership. How much you invest first, and what ownership that buys.
Reserves. The share of capital held back for follow-on rounds.
Pacing. How quickly you deploy new capital. Carta's 2025 Fund Economics Report puts the median investment period for venture funds at five years.

In our view, many weak portfolios come from setting the dials one at a time: a check size that felt right, then a count too small to catch an outlier. Nobody chose that portfolio. It just piled up.

Run the portfolio math before the first check: a worked example

Take a $50M seed fund. The numbers below are illustrative assumptions, anchored to public benchmarks where noted.

Fees and expenses. Carta's 2025 Fund Economics Report puts the median management fee at 2 percent. At 2 percent a year for 10 years, fees would total $10M (20 percent of commitments), although 81.9 percent of venture funds on Carta use at least one fee step-down. Allowing for fees and expenses, assume $40M is investable.
Reserves. The fund reserves 40 percent, or $16M, leaving $24M for first checks.
Initial checks. At $1.2M each, that funds 20 companies.
Ownership. Carta's July 2026 benchmarks put the median seed round at about $4.1M raised on a $24.3M valuation. At a $24M post-money valuation, a $1.2M check buys 5 percent.

Now test the plan against a return target. To return 3x its size, the fund needs to send $150M back to LPs, and more than that once carry is paid. Dilution erodes the 5 percent stake: Carta's same benchmarks show median dilution of about 18 percent at seed and Series A and 12 percent at Series B. A 5 percent holder that skips its pro rata falls to about 3.6 percent after a Series A and B, and to about 2.9 percent after two more 10 percent rounds.

Ownership at exit	Exit value needed for one company to return $150M
3% (no follow-ons)	$5B
5% (pro rata defended)	$3B

Then run the harsh case. Some investors now argue for modeling up to 75 percent dilution before an exit, which makes the effective entry price about four times the paper price. On Carta's median round data, the 5 percent stake above keeps about 58 percent of its ownership through a Series A, a Series B and two 10 percent rounds (ending near 2.9 percent). At 75 percent dilution the same stake ends at 1.25 percent, and one company would need a $12B exit to return $150M.

Same fund. Same check. The required outcome more than doubles.

It may be worth modeling both cases, the median and the 75 percent path, before committing to a check size. The math behind that shift is covered in high seed valuations and venture return math.

"But ownership doesn't matter anymore"

The worked example treats ownership as the main lever. In 2026 that's one of the most contested assumptions in venture, so the other side deserves a fair hearing.

Matt Murphy, the Menlo Ventures partner who led the firm's Anthropic investment, holds that ownership matters far less than it used to. In his framing, a small stake in an enormous company beats owning 20 percent of a $500M exit. Menlo's first Anthropic check was a little over $10M, a starter position for which the firm set aside its usual fund parameters. When later rounds needed far more than the fund could provide, Menlo raised its first special purpose vehicle, of more than $500M. Even a partner at one of the most concentrated early-stage firms has called missing the foundation model companies a failure: a chance at 30x on scaled capital within four or five years is a miss no matter how well the rest of the fund does.

That's a strong case. For some firms, we think it's the right one.

But Sequoia's Julien Bek keeps high ownership targets, and his reason is time rather than math. In his view an investor can realistically serve on only about 20 boards over a career, and he pitches himself to founders as close to a co-founder, helping them close first customers and top hires. That kind of help is hard to provide across 200 companies at 2 percent each. On that view, a model built on scarce partner hours needs high ownership.

Our read is that both positions can be right for different fund designs, so it helps to choose the design first. A multistage firm with growth funds, SPV capacity and LPs who co-invest can buy a small stake early and scale into the winner later, so entry ownership matters less. A small seed fund can't write a $500M follow-on, so the stake it buys on day one is most of what it will ever own. For that fund, we think meaningful entry ownership matters a great deal, and the stress test at 75 percent dilution is one good way to check whether your target is high enough.

Reserves: size them to your fund, not to habit

Reserves should follow fund design, and we suspect many small seed funds hold more than they can use well. For years the norm was to reserve a large share for pro rata; Hunter Walk of Homebrew dates the conventional range, when Homebrew started in 2012 and 2013, at 20 to 50 percent of capital. The follow-on investment guide covers typical reserve ratios and how to size them.

Walk made the case against heavy reserves in funds of $100M or less publicly in July 2026, after changing his own mind, and we find it persuasive. Follow-on rounds often arrive weeks or months after the first check, with little new information. Crowded cap tables can leave small funds shut out of their pro rata anyway. Rounds bid up like auctions by less experienced investors push follow-on prices up.

Others argue reserves protect ownership in the winners, which is why many funds still hold them. We'd agree that less isn't the same as none: a strategy that can't back its breakout company leaves the biggest return on the table.

One alternative is to put more of that money into first checks, judge each pro rata opportunity against the best new deal available, and use SPVs where conviction is higher than the market price. Recycling early exit proceeds into new investments, within the limits set in the fund documents, is another lever; Homebrew got to more than 120 percent invested in each of its first two funds.

A few rules of thumb for reserves:

Reserve by probability, not by habit. It helps to estimate what share of companies will raise a next round and what you want to invest in each.
Make every follow-on compete. One approach is to back a company again only where your conviction is higher than the round price implies, and higher than your best new first check.
Plan the tiers. A quarterly venture capital portfolio review can help decide which companies get reserves.

The pro rata rights guide covers the contract terms that make follow-on checks possible.

How many companies should a venture capital portfolio hold?

We don't think there's a single right number, but the tradeoffs are fairly clear. The counts below are rough, illustrative bands, not survey data:

Approach	Typical count	Strength	Risk
Concentrated	15 to 25	High ownership, deep support	Can miss the outlier entirely
Balanced	25 to 40	Better odds of an outlier	Less time per company
Index-like	50 or more	Broad exposure to outliers	Low ownership, thin support

The power law data argues against going too small. If about 6 percent of investments return 10x or more, and outcomes were independent, a 10-company portfolio would have about a 54 percent chance of holding no 10x company; at 20 companies the odds fall to about 29 percent, and at 30 to about 16 percent.

Competition argues for a clear edge. With large multistage funds bidding for the best companies, smaller investors usually need a stage, sector or access advantage. If you can't name yours, we'd lean toward the balanced band rather than concentrating.

Where we land

For what it's worth, our own fund sits around thirty companies, the middle of the balanced band. We've written about why we don't think there's a magic portfolio number, and thirty isn't one. It's where our thesis happens to land: enough names to have a real shot at an outlier we can't predict perfectly, few enough to know each company and show up when it matters.

It's our answer, not the answer. An angel with deep domain knowledge might reasonably run ten or fifteen. A platform built on volume might run two hundred. Both can work.

For fund managers, that means setting the dials together and stress-testing the ownership math before the first check. For angels, it means picking a count on purpose and keeping something back for the companies that earn it.

Portfolio strategy for new angel investors

Angels face the same power law with fewer resources. As a rule of thumb, we would treat 10 companies as a floor and 20 to 25 as a target, added at four to six a year. Rockies Venture Club's angel portfolio guidance uses the same bands, and its outcome summary shows why: about 50 to 60 percent of angel investments return less than the original amount, while about 10 to 20 percent return 5x or more.

A simple, illustrative angel plan:

Set a total budget you can afford to lose and leave untouched for 10 years.
Divide it. For example, $250K becomes 20 first checks of $7.5K ($150K) and a $100K follow-on budget.
Pace it. Four to six new companies a year.
Follow good leads. Invest alongside experienced investors while you learn.
Review quarterly and decide follow-ons deliberately.

Under SEC rules, angel investing in private offerings generally requires accredited investor status. The SEC's definition includes individuals with net worth over $1 million excluding a primary residence, income over $200,000 (or $300,000 with a spouse or partner) in each of the prior two years with the same expected for the current year, or certain professional licenses (Series 7, 65, or 82).

If you qualify and want to learn from the inside, 1752vc's Emerging Angels is an 8-week live program for accredited investors new to angel investing. Members get a seat at the table in a working fund's investment process, with live diligence calls, deal reviews, monthly Investment Circles, and a private community. The venture capitalist vs. angel investor guide explains how the two approaches differ.

The mistakes that tend to sink a portfolio

In our view, the most common one isn't a wrong number. It's a number nobody chose: fifteen scattered checks, each sensible alone, with no thesis tying them together. The rest tend to follow:

Too few companies. Five angel checks rarely include an outlier.
No reserves plan. Winners can raise again quickly, and the cash is gone.
Reserves on autopilot. Following on in every company because the money was set aside can ignore the power law.
Borrowed ownership logic. Copying a multistage firm's small starter checks without its follow-on capacity.
Style drift. Chasing hot sectors outside your thesis can dilute your edge.
Deploying too fast. Investing a whole budget in one year concentrates vintage risk.

The bottom line

No count, check size or reserve ratio suits every investor. The portfolios that work tend to share one thing: someone set the dials together, on purpose, and checked the math before the money went out.

The power law decides which company wins.

Your construction decides whether you own enough of it to matter.

Key takeaways

A venture capital portfolio strategy sets five linked dials: thesis, company count, check size and ownership, reserves, and pacing.
Venture returns follow a power law: Horsley Bridge data shows about 6 percent of investments produced about 60 percent of returns.
Ownership at exit largely decides how big a winner needs to be: in the illustrative example, at 3 percent one company would need to be worth $5B to return $150M, and at 1.25 percent, $12B.
Whether ownership matters depends on fund design: multistage firms can start small and scale in, while small seed funds, in our view, need meaningful ownership on day one.
Early-stage funds have long reserved roughly 20 to 50 percent for follow-ons, and we think many small funds should hold less and make every follow-on compete with new deals.
As a rule of thumb, angels might aim for 20 to 25 investments over several years, with a separate follow-on budget and a quarterly review.

Frequently asked questions

What is portfolio construction in venture capital?

Portfolio construction is the plan for how a fund or angel allocates capital: how many companies to back, how much to invest initially, what ownership to target, how much to reserve for follow-ons, and how fast to deploy. It turns an investment thesis into numbers that can be tested against a return target before the first check is written.

How many companies should be in a VC portfolio?

It depends on fund size and strategy. Concentrated seed funds may hold around 15 to 25 companies, while others hold 30 to 50 or more to improve their odds of catching an outlier. For angels, we would treat 10 investments as a rough minimum for basic diversification and 20 to 25 as a target, which matches Rockies Venture Club's guidance.

What is the power law in venture capital?

The power law describes how a small share of investments produces most venture returns. Andreessen Horowitz's 2015 analysis of Horsley Bridge data found that about 6 percent of investments, representing 4.5 percent of dollars invested, generated about 60 percent of total returns, and Benedict Evans's 2016 look at Horsley Bridge data found that around half of investments returned less than the money put in.

How big an exit does a VC fund need to return the fund?

A simple method is to divide the target return by the ownership you expect to hold at exit. A $50M fund aiming to return 3x ($150M) from one company needs a $5B exit if it owns 3 percent, or a $3B exit if it owns 5 percent. That math is a big reason funds care about ownership targets and reserves.

Does ownership percentage still matter in venture capital?

It depends on the fund. Multistage firms such as Menlo can take a small starter stake in a potential outlier and scale in later through growth funds or SPVs. Small seed funds usually cannot follow on at that scale, so the stake they buy first is most of what they will own, and in our view they still benefit from meaningful entry ownership.

How should a new angel investor build a portfolio?

A common approach is to set a budget you can afford to lose, split it into many small first checks plus a follow-on reserve, invest steadily over several years, and co-invest with experienced leads. Many angels also review holdings every quarter and follow on only where their conviction is higher than the price of the new round implies.

Sources

Disclaimer: This guide is for general education only and is not legal, tax or investment advice. Laws, market data and program terms change, so it may not reflect the latest developments or fit your situation. Treat it as a starting point, not a source of truth, and talk to a qualified lawyer, accountant or financial adviser before you make decisions.